The relationship between tourists and animals in ecotourism has become a research focus among zoologists, anthropologists and sociologists. Primate provisioning is commonly seen at ecotourism sites in China, while monkeys threatening or biting tourists is a rising problem. This study recorded interactions between tourists and macaques on the Nanwan Monkey Islet between 2012 and 2014, and analyzed clinic records on injured tourists. We discuss: (1) the characteristics of visitors who were involved in macaque-human interactions; (2) the characteristics of macaques that were involved in the interactions；(3) the factors which triggered the interactions. This paper aims to understand relationships between tourists and macaques, to find possible solutions to reduce injury risk of tourists, and to improve the management of wildlife tourism in the country.